Common-Size Income Statement
Quarterly Data
Based on: 10-Q (reporting date: 2023-06-30), 10-Q (reporting date: 2023-03-31), 10-K (reporting date: 2022-12-31), 10-Q (reporting date: 2022-09-30), 10-Q (reporting date: 2022-06-30), 10-Q (reporting date: 2022-03-31), 10-K (reporting date: 2021-12-31), 10-Q (reporting date: 2021-09-30), 10-Q (reporting date: 2021-06-30), 10-Q (reporting date: 2021-03-31), 10-K (reporting date: 2020-12-31), 10-Q (reporting date: 2020-09-30), 10-Q (reporting date: 2020-06-30), 10-Q (reporting date: 2020-03-31), 10-K (reporting date: 2019-12-31), 10-Q (reporting date: 2019-09-30), 10-Q (reporting date: 2019-06-30), 10-Q (reporting date: 2019-03-31), 10-K (reporting date: 2018-12-31), 10-Q (reporting date: 2018-09-30), 10-Q (reporting date: 2018-06-30), 10-Q (reporting date: 2018-03-31).
An analysis of the common-size income statement reveals a significant expansion in operating efficiency and profitability margins from the first quarter of 2018 through the second quarter of 2023. The most prominent trend is the systematic reduction of operating expenses as a percentage of revenue, which has directly contributed to a substantial increase in both operating and net income margins.
- Operating Expense Dynamics
- The primary driver of cost reduction is found in salaries, wages, and benefits. This line item, the largest single expense, fluctuated between 50% and 54% of revenue from early 2018 through 2020, before entering a period of decline. A notable low was reached in mid-2022 at 42.10%, although it moderately corrected to 45.49% by June 2023. Operating supplies and expenses exhibited higher volatility, dipping to 8.41% in June 2020 before peaking at 14.20% in June 2022, suggesting periodic fluctuations in input costs or operational requirements.
- Depreciation and amortization as a percentage of revenue showed a general downward trend, moving from levels around 6% in 2018-2020 to lows of 4.10% in June 2022. This suggests that revenue growth outpaced the growth of the depreciable asset base during this period. Other expenses, including general supplies and operating taxes, remained relatively stable, typically hovering between 2% and 3% of revenue.
- Profitability and Margin Expansion
- The cumulative effect of reduced operating expenses is evident in the operating income margin. The margin increased from 16.14% in March 2018 to a peak of 30.93% in September 2022. While there was a slight contraction in early 2023, the margin remained robust at 27.71% by June 2023, representing a significant improvement over the 2018-2019 baseline.
- Net income margins followed a similar upward trajectory. Net income as a percentage of revenue rose from 11.82% in March 2018 to 20.69% in June 2023. The peak net margin of 23.53% occurred in September 2022, coinciding with the peak in operating income.
- Non-Operating Items and Taxation
- Non-operating income and expenses remained immaterial relative to total revenue. Interest expense was negligible throughout the period, and interest income showed a slight increase toward the end of the period, peaking at 0.20% of revenue in September 2022.
- The provision for income taxes as a percentage of revenue increased in tandem with profitability. Tax expenses rose from approximately 4-5% of revenue in 2018 to consistently higher levels of 6-8% between 2021 and 2023, reflecting the higher taxable income resulting from expanded operating margins.
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